Initial setting of mesh username

src/freedombone-image-customise

 # defines the initial keyboard layout
 KEYBOARD_MAP='gb'
 
+# Strings used for setting the username
+MESH_TITLE=$"Freedombone Mesh"
+MESH_SET_USERNAME=$"Welcome to the Freedombone mesh.\n\nThe first thing you will need to do is set a username so that other peers can find you."
+
 enable_eatmydata_override() {
     chroot $rootdir apt-get install --no-install-recommends -y eatmydata
     if [ -x $rootdir/usr/bin/eatmydata ] && \
 	echo 'while [ ! $INITIAL_TOX_USERNAME ]; do' >> $START_DESKTOP
 	echo '	data=$(tempfile 2>/dev/null)' >> $START_DESKTOP
 	echo '	trap "rm -f $data" 0 1 2 5 15' >> $START_DESKTOP
-	echo '	dialog --title $"Freedombone Mesh" \' >> $START_DESKTOP
-	echo '		   --backtitle $"Freedombone Mesh" \' >> $START_DESKTOP
-	echo '		   --inputbox $"\nWelcome to the Freedombone mesh.\n\nThe first thing you will need to do is set a username so that other peers can find you." 12 60 "Anon" 2>$data' >> $START_DESKTOP
+	echo "	dialog --title \"${MESH_TITLE}\" " >> $START_DESKTOP
+	echo "		   --backtitle \"${MESH_TITLE}\" " >> $START_DESKTOP
+	echo "		   --inputbox \"${MESH_SET_USERNAME}\" 12 60 \"Anon\" 2>$data" >> $START_DESKTOP
 	echo '	sel=$?' >> $START_DESKTOP
 	echo '	case $sel in' >> $START_DESKTOP
 	echo '		0)' >> $START_DESKTOP
     echo "Exec=bash -c '~/mesh-desktop.sh'" >> $START_DESKTOP2
     echo 'X-GNOME-Autostart-enabled=true' >> $START_DESKTOP2
     chmod +x $START_DESKTOP2
+
+    START_DESKTOP3=$rootdir/home/$MY_USERNAME/.config/autostart/set_username.desktop
+    echo '[Desktop Entry]' > $START_DESKTOP3
+    echo 'Version=1.0' >> $START_DESKTOP3
+    echo 'Name=Set Username' >> $START_DESKTOP3
+    echo 'Type=Application' >> $START_DESKTOP3
+    echo 'Comment=Set username' >> $START_DESKTOP3
+    echo "Exec=mate-terminal -e /home/${MY_USERNAME}/mesh-desktop.sh" >> $START_DESKTOP3
+    echo 'Icon=user-away' >> $START_DESKTOP3
+    echo 'Terminal=false' >> $START_DESKTOP3
+    echo 'Categories=Application;' >> $START_DESKTOP3
+    chmod +x $START_DESKTOP3
 }
 
 function mesh_desktop_icons {